While driving to work this morning my temp gauge went all the way to H. I had just left my house and had driven about 4 miles. I immediatley turned the car off and pulled over to the side of the road. I checked under the hood and opened the radiator cap slightly to let the pressure out. After all the pressure was let out, I let the car sit for a few minutes and then restarted. At this point the temp gauge was in the normal range, so I drove off and the car ran fine and did not overheat.

The same thing happened yesterday morning, only I didn't noticed the temp gauge immediately. Yesterday the car felt like it stalled cause when I would give it gas it would no go. I had the radio up loud so I couldn't tell if it stalled or not, but when I turned it down the radio the car was still running. I pushed in the clutch and the car would rev, but I couldn't get the car to rev with the clutch depressed. This is when I noticed the temp gauge on the H. I turned the car off and let the pressure out of the radiator like today. When I restarted the temp when back to normal and the car ran fine.

I was not in boost when this occured on either occurance. Although last night I was driving the car hard and didn't have any overheating after the first incident.

What could cause this? I am thinking the cooling system has bubbles in it. I had the stock radiator replaced about 2 months ago with the PE radiator so the system was drained and refilled. Could air bubbles be in the system for that long with out cause any issues and later surface?

 

It might be air bubbles... When I switched to the Koyo, my car was doing the same thing. I drained and refilled the radiator as well. I then figured out that when I opened the radiator cap, instead of it letting the pressure out, more air came in and created more air bubbles. After a period of two weeks it was still doing it, and then my mechaninc recommended that I turn up the heater all the way and then let the bubbles out, and this did the trick. Try and see if that works.

 

So I just let the car run with the heater and the bubble will bleed out? How long does it take?

 

Yeah, just turn the heater up all the way and screw open that screw to let the bubbles out, and leave it like that for about 10-15 minutes. Then close it again, let it rest a few minutes (with heater still on) and then open it up and see if there are any more bubbles.

 

Check out this "how-to" on changing hoses, it has a good section devoted to making sure the cooling system is totally bled.

http://crackaddict.com/~flynn/howtos...amco.howto.htm